Sure, but I think cows producing methane is probably more harmful and more immediately easy to fix (i.e. I'd rather go on holiday than eat meat). The Earth can probably support air travel if we can get rid of most other sources of greenhouse gases.
[1]: https://www.sciencedaily.com/releases/2019/06/190617164642.h...
[1] https://static.skepticalscience.com/pics/us-flowchart.jpg
Also note that North America used to have as many as 60 million Bison, versus about 95 million cattle today. And cattle emit about as much or less methane than bison do, per animal.
https://daily.jstor.org/can-cows-help-mitigate-climate-chang...
Cow worries are just smoke to hide the real issue that is the fossil fuels, specially boats and planes.
What's easier to do telling people to stop eating steak, or getting governments to reduce their biggest "sponsors" earnings?