What utter nonsense. Only totally unrealistic scenarios could still limit global warming to 1.5 degrees. As in: we stop using fossil fuels today and stop eating meat today (both would collapse the economy). In reality we have known about this for a long time, starting really talking about it in 1979 and launched IPCC in 1988. We're now 46 years in the future and apart from some hiccups due to COVID and the odd economic/oil crisis, each and every subsequent year we have increased our emissions and destroyed more forests, accelerating the problem. Humanity should be ashamed of itself and no longer deserves to survive on this planet. And probably they won't.
Also, the idea that 1.5 degrees is still feasible is based not only on the unlikely idea that we will stop burning fossil fuels anytime soon but also on the assumption that the boatload of "unlikely" tipping points and feedback loops that we routinely leave out of models because of uncertainty don't do what they usually do: make things much worse than our models predicted.
Humanity and many other species are absolutely fucked. The most "extreme" action currently taken is what Extinction Rebellion is doing and that's embarrassingly little compared to the horror we're facing. It's a matter of time before some desperate people are going to do things that actually help and it will probably involve removing the culprit from this planet, which almost certainly includes you, assuming you're complicit because you're still driving a ICE car, eating meat (routinely left out of IPCC scenario's for political reasons!!!), heating your home with gas and perhaps even flying planes. If so, you're actually consciously murdering future people and the consequences WILL find you. Good riddance.