My guess would be that people aren't aware of the discourse you've been involved in regarding "philosophy" vs "academic philosophy". As stated, it seems like you're expressing something contradictory. Compare:

"philosophy...[is] not concerned with truth"
"people who can do good philosophy...[are] usually scientists"

You seem to be equivocating. In the first sense, I think you mean "academic philosophy" (the institution), while in the second, you mean... well, philosophy (love of wisdom / pursuit of truith).

Though I'd be surprised if anyone actually thought it through that clearly before downvoting.