We have a well-defined card certification process, from the moment we receive your cards to the moment they are shipped, graded and protected
Monsters gain a lot more stats from their level-ups than humans do, and thus will statistically outpace them with pure leveling and tend to have greater movement and Counter ability, among other abilities inherently, which makes them more powerful at base, but monsters never get any new moves (with their move sets being determined by what species they are) and can't use any equipment, overall severely limiting their potential compared to humans who learn a wide selection of useful skills and have very powerful equipment at their disposal
Id like Mathias Kollros to explain the collar thing that drags to the ground like the Fourth Doctors scarf
Its fine to encase a trading card in plastic and get a standardized look at the condition under the watchful eye of an expert, but at that point, you are taking the item off the table as a playable card
You could even choose no modes at all