Self-guided bike tours are a great way to visit a foreign country. It takes a certain spirit of adventure to attempt a self-guided bike tour, but many riders already have this kind of confidence and adventuresome spirit.
Of course not having the guides along with a support van is certainly the most obvious drawback. The guides can essentially "take care" of the guests during the tour. So, guides can be an added advantage when going on a bike tour.
There are many bike rental companies are also available. If you are planning to go in bike tours, then you can also navigate https://bikelifeisrael.com/.
You can get to a certain point ie. When they have a large group, it's hard to take care of everyone. For people who don't want to ride all or part of the bike, they can, for example, get on an additional train if there is space.
Some people just love to be part of a group and follow people behind the scenes without trying to read directions and figure out where they are on the route of the day.
The guides usually speak at least a small amount of the language of the country they are in. So from time to time, it would be helpful to have someone available to translate. If you are single, especially single women in a foreign country, group travel may be a better option.