It's not that difficult to do if you focus on arranging your life around it. You can make a meal around raw vegetables (broccoli, cabbage) if there is nothing else healthy available while away from home. Most people think that they can't skip meals, but calorie restriction and water fasting can be healthy, so I don't worry if I go a day without much food.

I'm not sure if lectins are a problem to worry about. Most results that I see in Google are blogs by self-described health experts who are selling products and personal brands. There's also this:

https://www.washingtonpost.com/lifestyle/wellness/going-lect...

I‘m not that versed in reading dietologic papers, but this review (or whatever you wanna call it) found some concerns that I‘d not dismiss immediately: http://www.krispin.com/lectin.html

I don’t know if the WaPo is a good resource to debunk anything ;)

There may be some truth in there somewhere, but I'd like to see more studies.

The Washington Post article is written by a registered dietitian and there is some kind of editing process. The other link is self-published.

It says things like, "our ancestors just didn't evolve eating this type of food and our immune system can't handle it".

but humans have been eating grains for 100,000 years:

https://blogs.scientificamerican.com/observations/humans-fea...

I'll keep an eye out for lectin research though. Thanks for the tip.