The buses spelling looks to me like it should rhyme with fuses. Busses has the virtue of not... doing that.
The point I believe the parent post is making is that you cannot assume that buses would rhyme with fuses, because English orthography is so inconsistent.
Which is partially true - I haven’t seen any research to the effect, but I’d guess you can still predict the pronunciation of an English word with better than a fifty percent chance of success.
The fact you think "busses" is a preferable spelling to "buses" because it might help you pronounce "buses" differently to "fuses" is only relevant to you yourself. I would have thought this was tautological, myself.
In summary, we could avoid all these fusses with a bit of effort to adhere to accepted usage.