Q: Is "Net Zero" emissions by 2050 possible?
A: That doesn't matter at all! Suppose only "net 2%" is possible by 2050, or even "net 5%", or whatever. Fine, let's do that, and stave off most of the effects of global warming.
Warming is evident now already, both in average temperatures and in extreme weather event increasing in frequency and severity. So, action needs to be taken now, and never mind what's the exact percentage in 2050. That does not mean everything needs to be fixed in a day, and there will surely be changes along the way; but human society, and world states in particular, need to make short-term plans for significant reductions in emissions. And those plans need to be put into practice almost-immediately.
Instead, we have the modified version of climate denialism: From "it's not a problem" to "it's not a serious problem" to "we can no longer do anything about it, it's too late" - with their conclusion always being not to change government policy, not to tax, not to invest public funds in alternatives to what they sell right now, and in short to keep their donors rich and getting richer.