“Even if there’s possible heteirim, however weak or strong as they may be, why get involved in something you need to rely on heteirim for (and may even inadvertently cross the line) when instead you can choose a field of parnassa that is 100% kosher?”
And which field would that be exactly? G-d gave us a torah with a whole lot of laws so we can delve into it and figure out what is permitted and what is not- not so we can say o man this is too complicated, let’s just drop it.