Latch on is just a fancy word for bind, at least to my understanding.

Spike proteins linking or connecting cells seem like a reasonable hypothesis behind the VITT (vaccine-induced thrombotic and thrombocytopenia) incidents from the adenovirus-based vaccines. As far as I know, however, the accepted biological explanation for VITT is the formation of PF4 antibodies. Whether spike protein-induced cell linking is responsible, I'm not sure. But I doubt it because that would mean all the other spike protein-based vaccines can cause blood clots, which isn't true.

I think anyone can be wrong. New research may change things again. I may be indirectly responsible for whatever you are implying, although that would also apply to 'they' or 'them.'

Therapies eliminating spike proteins is an interesting point. But I'm still in favor of vaccines because they prevent rather than stop things. Thus, using something like anti-spike proteins drug must be administered early during the course of virus infection, which we always fail to do as SARS-CoV-2-infected persons may not manifest symptoms until a few days later. Plus, Covid-19 kills via other mechanisms besides spike protein. For instance, SARS-CoV-2's genome encodes genes responsible for immune dysregulation.