I wouldn’t argue against mic placement being important in sound recording but we’re talking about field recording here, which is a bit more rough and ready.
Louder ambient spaces can make judging what you’re hearing through headphones, against the leakage, a real challenge and opportunities can easily be missed if you get bogged down with preparation.
The use of SD cards and the like with their huge capacities and low cost have transformed photography and recording.
You can affiord to just try anything and everything out, on the spot, without worrying about wastage.