That's ok, if it is a reputable company. But you should at least ask. This lets you know where and in what they specialize. They should be able to tell you a lot about this tour. Many companies rate the difficulty of their active travel tours so you can calibrate tour difficulty to your needs.
Active travelers are often intensely loyal to the company they travel with.
Talking with someone, therefore, will be especially useful to you in answering many of these questions. If you are a single woman in your fifties, ask to speak to someone like you. Or if you travel as a couple, ask for phone numbers of at least two couples. So ask about group composition. You'll have more fun with a mixed group, rather than a homogeneous group.