Some people might have a trait we could call the “three minute passion,” referring to people who like to learn different things in a short time, but will not dedicate themselves to one skill long enough to make substantial progress. For example, a person finds painting interesting, locates a teacher to study for months, then changes to carpentry, and months later switches to music playing: These are all the wonderful skills, but in the end the student might not master any.
It is the same for Qigong. It is better to focus on one and practice consistently and diligently. "Gong" means a cultivation through time with consistency. For Qigong practice, “less is more” and “simpler is better.”
If a person switches from painting to carpentry, at least no harm is done; but if a person switches among different forms of Qigong back and forth, or mixes multiple Qigong forms up, it might cause the Qi to become scattered and dispersed. This does not include beginners who is still trying out different Qigong forms, or Qigong academic researchers who need to study different Qigong styles for their studies.
Basically, there are two levels of the practice or cultivation: the "basic level" is to get more, trying all different things without a clear direction, while the "advanced Level" is to let go but with a clear purpose.
Surely, everyone can be his/her own master and decide what to do with their practice, but there is one simple guidance universal in the Qigong field, and that is "less is more."