It’s up to you,i mean what will be your position next year exactly the same time.
yes,its worthy to take 4 drops if you get the college you want.
i remember when cbsc restrict the age to 25 years max for neet and even after that people protest against cbsc and eventually cbsc stepped back.
you already took 3 drops and now you are thinking that should you choose b. sc nursing or go for the 4th drop.
you dreamed fro mbbs then why settle with b. sc .
all i want to say is that make your decision count and no one will ever remember how much years you prepared for neet.