I do his because I am immuno deficient, due to medications. My risk analysis will be different than yours.

One study shows that the safety materiel is more contaminated than the toilets. The tone in one other seems to indicate than airplane toilet are significantly more infected than other common public space.
One point is that even if the level of germ contamination is similar to elevators, cafeterias, airplane are space with factors increasing the risks:​​​​​
- confinement for hours
- recycled air with no ability to get fresh air
- immobility of the passengers
- alcohol