Whether blogs for tourists would be good and relevant to your needs would depend upon what it is that you may be looking for. You can find all types of travel blogs online including those that only feature actual trips from the part of bloggers to different parts of the world engaging in different types of activities.
So if it is skiing that appeals to you the most then you will want to benefit from details of trips to different parts of the world where bloggers have actually attempted skiing so that you can get ideas on what you need in order to be able to do the same.
A number of factors determine what information you will require and this includes what part of the world you may be from together with which language you require information in. If you are from Poland then you will want to go after blogs for tourists (also known as ‘blog dla turystów’ in Polish) that provide information appropriate to people from your part of the world traveling to specific destinations to engage in specific types of activities.
So yes, definitely blogs for tourists are quite helpful for people looking to travel. But these types of blogs are also important for people who just want to improve their general knowledge as there are different types of information that you could be getting from these types of blogs. From Interesting places to visit in different parts of a particular country to what you should and should not be doing when you are in a particular country, everything can be found on relevant blogs.