This is a true statement if you are talking about shopping centre massage jobs !
Yes, those jobs are very tough and very tiring and if the ml didn't learn properly how to apply the body weight to add to her strength, she can easily hurt her own hands and fingers too! That's why so many legit mls switch to RnT so that the demand on their body is less and they can earn more tips by doing the tugs ! And even more tips if they get naked and a lot more money if they do some more extras and the lists goes on........
I can write for the next few hours and share some more, but it's getting late, may be some other times
Cheers