I would argue that the person willing to give up 95% of their meat consumption cares more about making a change than the one telling them not to bother at all because it’s not the full 100%.

According to one survey, which has some interesting statistics on veganism:

52.1% or 6779 participants said they were vegetarian prior to going vegan.

Research suggests that people are more likely to stick to habits that they adopt gradually rather than suddenly making drastic lifestyle changes, and it’s much easier to reach 100 from 95 than it is from 0. Maybe a better vegan substitute for bacon will be invented in that time and they’ll give it up even sooner.

As another user here says, don’t let perfection be the enemy of good.