I disagree.
There will be significant demand for leather for the foreseeable future.
And Chinese will want leather.
There are 1.4 billion cattle across the globe. I would expect that is primarily driven by food production not leather.
My guess is removing leather from Tesla steering wheels is likely to save 0 cattle from being raised and slaughtered.
The lady from PETA should be setting up tables outside supermarkets to educate people about the health and environmental reasons to give up or limit beef consumption, rather than wasting her time lobbying against steering wheel leather.