If it's scientifically proven that plants are sentient and feel pain (I'm dropping the like conjunction because that's pushing it past the breaking point), you'd prefer keeping them alive in perpetuity to continually rip off their genitals over killing them outright?
Personally, at least until we can efficiently synthesize arbitrary dietary proteins, fats, and fibers, I'll keep using my computer built from rare earths mined with exploited workers to post about the delicious, factory-slaughtered chicken I just ate.