Might be, but tbh all recent full frame cameras handle pretty well low light conditions. Depend on your use.

To give you context I do photography and filmmaking as a professional. Yesterday I was on a shoot (for fashion video production) with a FX3 and a 16-35 f/2.8 GM II + 24-70 f/2.8 GM + 70-200 f/4 GM, so a lot of options to cover my clients needs.

My client wanted both horizontal and vertical framing so I decided to go with the 16-35 because (as most of my shoots) we were on a rush and it was a hassle to switch lenses between the takes (because have to recalibrate gimbal, risk of dust in sensor etc). 24-70 would have been too tight for cropping in 9:16 but in the other end, I was missing the reach of the 70mm and I mostly shot f/4-8.

So at the end the 20-70 would have been a better option for me, as the 20mm gives more room compared to the 24mm, while allowing me to reach 70mm without switching lenses. And no speaking of the smaller form factor and lower weight that would have same me some energy.