Let he who without sin cast the first stone!
People are good and bad at different things. Circumstances like dyslexia, amusia, educational gaps, and dyscalculia are not stupidity. Nor is struggling with unfamiliar technology, getting the wrong end of the stick, or posting in a hurry. Einstein-level genius Paul Dirac was famously incompetent in social situations, I suspect autism. Asked at a meal where he was going for his holidays, he thought silently for 15 minutes before replying: 'why do you want to know?'. Nobel Prize Winner fails simple social interaction despite being off-the-scale clever. I expect he drank red wine with fish too.
I admire skilled work in all forms. While I know how to calculate the depth of foundation needed to support a brick wall, I couldn't build a good one myself. My metalworking skills are below average too. Being clumsy and impatient in the workshop, I'm not qualified to criticise someone asking advice about bioler making.
In a friendly forum it's not polite to carp at trivial mistakes. Doing so invites retaliation and going too far makes you a bully. Errors of fact are different because our shared interest is Engineering. If I post Ohms Law as V=I/R, I should be corrected and I shouldn't take offence if the error is reported robustly!
Not about political correctness. It's about manners and tact. Please don't fart in church…
Dave