To be honest, I don't. You've simply chosen a fitting which is of one discipline, and you wanted another. That's it really.
Push-fit waste is one 'set' of sizes, and solvent is another . I've had a few occasions where solvent fittings have been slack on the pipe, rather than snug, but a generous layer of glue and some longer curing time has usually sorted it.
For the remainder of your plumbing adventure, remember to distinguish between PF and solvent and you'll suffer less headaches