It's not, if you assume the methane is burned completely. But it's being discovered that simply flaring methane isn't as efficient as previously thought, https://arstechnica.com/science/2022/09/oil-industry-flaring...

So, unless you're running the methane through a generator that burns it much more efficiently, like bitcoin miners are doing, we'd be better off bottling it up as methanol where it can be burned efficiently elsewhere.

The bigger impact is that it potentially creates a profit incentive to capture waste methane, so it's less likely that producers will cut corners and just let it vent. Why vent money into the atmosphere?

The open question is whether conversion to methanol and transportation will be cheap enough to actually generate a profit. If not, then it will be better off just getting burned on site.