People like Vivaldi writing homophonic music.

Bach wrote several transcriptions of Vivaldis music

Except Vivaldi did nothing of the sort.

The Four Seasons is not homophonic music? It varies by season but IIRC there's definitely some homophonic writing in there.

The question is not so much about polyphonic versus homophonic it’s about whether concert goers 300 years ago listened to Vivaldi after they listened to Bach and said “finally, a breath of fresh air!”

Could very well had been so, who knows.