To be clear I don't like this idea. I think this would increase the cost of founding a religion (as in a race situation literally everyone would do it and thus you would need to as well) but it would not solve the problem. More Faith-y pantheons would still win the race, and losing would be even worse. (So you would almost certainly need to give up if you failed and wasted producing anything in all your cities for 20 turns.)
Yeah if you want religion (which is obviously benefical long term) u should sacrifice your early game production securing it.
Ignoring religion altogether and going faith light pantheons results in better early, u spend your production other than faith
Comparison:
Pagans early cuz not faith yield pantheons+ early prod not spent on faith)
Religious late (thats why u pushed for religion so far)
Not founding would no longer be that much of a disadvantage compared to founding