every tipping point is just an arbitrary line that climate scientists draw to try to draw people’s attention to the problem

The +1.5C threshold is a somewhat arbitrary line designed around tipping points. The tipping points themselves are not imaginary/arbitrary. Forest fire spread increase. Methane defrosting. Polar melting path certainty. All of these increase GHGs and warming. Hurricane intensity+drought+intense rainfall events destroying property values is somewhat of an economic tipping point starting to affect some right now.