All that’s saying is if you are calculating “performance” return you need to deduct fees directly related to the investment process to get a net. Gross is great because I can compare apples to apples how managers attribution hold up against each other pure stock picking. If I look at Net of Fees it’s skewed a little because 1 manager could have super low fees and end up beating the other 1 but the other 1 has more skill. But in the real world… Clients don’t give a F*** as long as you are making money net of fees or beating the bench.
Some cases custody fees are bundled together because you have commingled funds and mutual funds so it’s hard to break out exactly what you are paying for. But overall they all provide some type of estimate in their prospectus.