Note that on-chain miners fee will be demanded for while opening and closing a channel, but you can open and close channel when fee is low. Lightning network fee is very low after you have opened a channel already.
^ there opens another flaw
most onchain locks are LOCKED. with a time period. meaning you cant exactly just close channels on a whim
LN wallets dont have a chat feature to discuss when someone wants to agree on a settlement. so most of the time people are on autopilot where the settlement is done when the time period expires
so forget being lucky to settle when fee's are low. unless you have good contact/communication with your favourite coffee shop to get them to agree to settle
if they see that you have settled early without their consent. they can see that as a violation of the channel contract.
so yea beg and plead and be nice to your starbucks manager.