You guys are talking about comfort, which is subjective. A pretty bad mouse or keyboard can have their downsides (beside input delay, which nowadays is not an existing problem, even the lowest brand does ok in that regard), but a player can adapt to it.
I started playing this game on a pc that, now, is 10 years, pretty awful stats, and a mouse and keyboard which were laughable. Using that equipment for a long time allowed a good comfort balancing, but it's specific to that. Switching just a piece of equipment in a case like this, with no info whatsoever about it, will require a careful work on it till you get a result.
Higher quality equipment instead has visible stats and programs to balance them, once found a comfort zone in this case all you have to do is compying the stats on an other one, maybe doing some tiny lil change.
I made this explaination as easy as possible (there are many more variables which are not relevant to my point) so I could deliver the actual sense of it all. Everything gets the job done, it's all muscle memory.
To this day I don't own any pure gaming equipment, a waste of money for what I have to use them for. I have a low brand mouse and it took me few weeks to get used to it, with 0 info about anything it does.
Obviously gaming equipment has it's role and it is important, but most of the times it's just overkill.
Remember this is a browser game, low requirements pc stats wise. Why in the world would you take in consideration stuff that goes way beyond its league...
P.S. I did use a gaming mouse and keyboard, I do have actual nerd friends which buy stuff just to optimize, which by itself is already too much.