The idea is good in theory and on paper, but in the real world a 16GB/512GB 15" MBA (with only 4 performance cores, no active cooling, no pro speakers, no pro display) will likely cost the same as a 14" Pro.
If Apple is smart (and of course it is!), the 15" MBA will be released a few months earlier than the M2 14" Pro. So lots of folks will buy the 15" MBA, only to realize a few months later that they should have waited for the M2 14" Pro (or just buy a M1 14" Pro for $1599 on sale).
If Apple is smart (and of course it is!), the 15" MBA will be released a few months earlier than the M2 14" Pro. So lots of folks will buy the 15" MBA, only to realize a few months later that they should have waited for the M2 14" Pro (or just buy a M1 14" Pro for $1599 on sale).