Now, do you think the gambling site or trading platform will reduced their minimal amount to be withdrawn or deposited from the site?
They operate from smaller retailers, which are larger in quantity, they won't neglect this segment. Therefore, they will rearrange everything depending on the situation. We can see a real case study from Binance. Around 2019, they had a minimum deposit of 0,001 Bitcoin (BTC). Now, do they still have that minimum deposit?
The answer is "No", currently, they have set the minimum deposit at around 0,00001 Bitcoin (BTC).
Another solution could come from LN scaling solutions, in the future, when $1M per Bitcoin (BTC), it's possible that LN adoption will be widespread throughout the world, making it easier to transfer & eliminating barriers in transactions.