Apart from that the ATGMs are not suit to defeat aircrafts, regardless of controlMANPADS are against air targets and currently aren't suited(Not that you can't) to engage ground targets sensor wise (especially older MANPADS ) neither are they suited to engage tanks or anything remotely armored that can withstand 14,5 mm or more since their Directed-energy blast fragmentation warheads are fairly small and well fragmentation warheads....
However, MANPADS and ATGM fusion is on it's way.
Evolution wise it makes sense. A lot of ATGM's can already be used to down slow and low-flying targets like heli's.
And if you're going to be adding optical seeker especially multichannel ones. Which is what said ATGM will likely have and pretty much all of them will have sooner or later. Might as well make those anti-tank guided missiles even more multipurpose then they already frankly are.
They designed to create a metal jet to penetrate the armor, and that is less than ideal to defeat an aircaft.
The required explosive and fregments different for tanks and aircrafts.
And anyway, the issue of the Ukrainans is the purposfully made MANPADSs are inefficient against modern helicopters, so what could be expected if you use ATGMs ?