That's a lot like the advice given to new photographers starting out to "explore all aspects/angles of a scene/situation and see what you can get"... the intent is to teach you to be able to see the "potential" of/for an image you might want to take. It's really pretty agnostic of genre or equipment.
Well, I of course don't know if that was the intent of the OP, I'm just making guesses.
However, on more general point , I'm not sure I agree wih you. I "see" the world very differently when hand holding a Fuji X100 compared to the way I see it using a 5x4 monorail on a tripod.
I also understand the idea of using X equipment to do Y type of photography outside of your norm; in order to revive some creativity, get out of a rut, etc... but that is still not using equipment not designed for purpose. E.g. I once did a series of "one camera/one lens, a pic/day" for a while and none of it was my typical wildlife photography or kit. I still wouldn't call that risky or improvisation, or even necessarily artistic/creative... I would call it "exploration."
But isn't using the "wrong" equipment the point of the OPs post..
As I said, I just saw using the wrong equipment, as an easy way of "forcing" you into a different approach. I thought the criticism was of someone spending a lot of money on an "ideal" landscape kit, and all they did was use it to make photographs of landscapes.
I don't really know what is meant by "safe", but it isn't necessarily about getting out of rut, it could be just about doing something different to take you out of your comfort zone for a spell to broaden your awareness, The risk part of doing this depends on how you view things. I agree with you on the exploration label, but I knew someone who posted photographs on Flickr, of a particular style, every day. He would never try something different because he couldn't risk failing to post pictures he knew his followers liked,
I think there is a notion behind it that is dismissive; that planning and control exclude creativity/artistry. I would argue the opposite... There are a couple genres that are almost entirely technical IMO, like astro and macro. But pretty much all others require a good bit of creativity/artistry to do particularly well. And some also require either a very high level of technical skill, or a very high level of determination/dedication, or both.
There's a reason I'm not a big into landscape photography... I have taken a couple images that literally took years and many attempts to come together and record.
I'm not sure what is being dismissed, Initially it seemed to be landscape photography, but the second post suggested it was "planned" photography like portrait, fashion and commercial
I think the amount of creativity/artistry required depends on the intent of the photograph. I wouldn't assess it a genre level. I don't agree with your comment on astro and macro (or, photomacrography, as I would call it): being highly technical, doesn't exclude the potential for creative/artistic work.