One thing that better infantry does is it shows to other countries, when you are participating in multinational exercises, that you are a professional army. When the PLA shows up with worse gear than thailand, for example, it's not exactly a good look for the worlds's no. 2, soon to be no. 1 military. In any other case, infantry might not be high on the priority list for AR, but it's the number 1 tool for holding ground. No matter how good your air force or navy is, ultimately you will have to go in by foot and clear out houses to actually take territory and defend against insurgency. For that reason, infantry should be placed way higher on the priority list and at least be trained, equipped, and provided quality logistics up to perhaps a 2010s US standard, think a 052D or J-20 moment, but for the infantry. It's not looking good that the previous infantry equipment upgrade program was cancelled and now apparently infantry equipment is regressing back to pre-2019 equipment levels (bare helmets with new camo being seen more and more for example)