I have to disagree that tech companies will ditch one SoC for another just to aid China in achieving "independence". The ban only applies to ZTE and hence we will continue to observe a dependency on foreign chips from other companies. I highly doubt that a company is willing to jeopardize the competitiveness of their products just so they could domesticate the chip industry. Additionally, the US ban is in place for only seven years, so unless a Chinese supplier can develop and produce a SoC that is more capable and much less costly than their foreign counterparts within that timespan, it is quite unlikely that it would jumpstart China's homegrown chip industry the same way a complete arms embargo had forced the rise of China's MIC.
I think you had a premise that differs from plawolf if I understand his post correctly which I share. You are assuming that other companies agree that ZTE bares all the fault. However, I believe other companies only agree that ZTE is guilty of breaking American domestic law, but they see that law being a bad law for their business. There are many such laws everywhere, people has to live with them, but they will do everything to bypass them preferably through legal means. So here comes the "substitution of the unreliable supplier".
For ZTE and any other company (not limited to Chinese), they want a supplier who is not at risk of fulfilling their commercial commitment due to political mood swing like the "Iranian sanction". The substitute is not necessary Chinese, it can be European or Japanese so long as these countries do not behave like US. The "Chinese domestic components" is just one of the many options, but it is the most secured option.
You would be right in a perfect world that is only ruled by commercial interest. Companies will not ditch one SoC (Qualcomm etc.) for another just to aid China etc. By we leave in a time where there are many Trumps, so the need of substitute.
If I put other company in the picture, after seeing ZTE's suffering and hint of investigation on itself, Huawei will be eager to substitute American elements too. That is the alarm. The ban today is only on ZTE, but it can be on anybody tomorrow, that is the lesson that people get. We know Huawei also want to do business in Iran.
Take European companies for another example. Trump just left the Iran deal, re-imposing (in 6 months) sanctions on anybody who does business with Iran. France (for one) has a 15 year contract (together with SINOPEC China) to develop an Iranian oil field. That is a threat to France too (by extension the EU). What is EU going to do with that? In this case there is no US component, but the key is the same, business is hurt by Washington's swinging mood, substitution is needed by EU. The substitution is "drop USD for oil trade with Iran, use Euro", China is pushing to settle with RMB and drop SWIFT (a clearance system based in US). The substitution is not easy as these oil companies have business somewhere in the world that US may be able to apply pressure, but the warning is clear and the motivation is certain.
To summarize, it is not other companies drop one SoC to aid China independence, it is all other companies to secure their future business unhindered by Washington. China, EU, India, Japan, SK (Iranian oil consumer etc.) are on the same boat.