Most of the guys providing services experience very complicated, stressful, and difficult lives—defined by grinding poverty and never ending financial obligations to the bottomless pit of very dysfunctional and often broken families.
They generally lack the critical thinking skills that most Westerners experience as second nature. Very few of them actually like working as service providers despite the smiles, genuine affection, and good nature they so readily share.
They will also not hesitate to completely reject you & your money, no matter the amount, if they don’t like you for whatever reason (e.g. fear of losing face, or loss of face, is by far the biggest driver). The interactions with the vast majority of their clients are opportunistic (and in real time) and a fleetingly brief transactional part of their lives.
In my experience, this is generally an accurate profile of who you typically meet. They are young men without much direction, ability to plan, very poor father role models, and not much hope for the future. Of course, there are exceptions to this but they’re few & far between.