You are making so much sense here, this 1% depends on the gambler, his plan and the amount he earns, as it could be too much to gamble at once in some casinos due to their terms and conditions if it is a huge amount of money or too small to gamble if the gambler is such that makes a very low income. This is a good reason why it can't be a basis for everyone, and in my last replies here, I made it clear that whether or not it even goes in line with my income, it can never go well with my personality and my gambling plans, so it is dead on arrivals as far as I am concerned.
I do not measure my wagering amount in gambling with any modality, based on my discretion, I only earmark a certain amount that is convenient for me to gamble and that I can lose without being hurt. That is the money I gamble with, and it's so far so good for me, which I ever intent to keep. However, I know this is so precious to the OP according to how he has shared his view and it is not entirely bad as well, which is why I say we should go for whatever we love in gambling so long as it is convenient and working for us.
Yeah, I think it might help a bit to some people to look and see how much of their income they are gambling away, and change behavior if needed.
But as a rule, I don't think it applies to everyone.
Sure, if you are OK financially and have fun gambling, and it is about 1% of your income, then they might be happy with that outcome.
Maybe that was the original intention of OP.