I don't need to know what's in people's minds when they make it clear with their comments.
Your premise is that Martinez' size means he will struggle against certain types of strikers, citing the reality of basic physics. And you point to Ivan Toney as an example of the type of striker Martinez will struggle against.
Yet Toney is only minimally bigger than Martinez physically.
This could mean you think even that scale of a physical advantage is significant enough for Martinez to be as outmatched as you anticipate, in which case you straight up don't understand physics as applied to body dynamics. Because that minimal a size difference simply doesn't confer the degree of innate advantage you are anticipating when you say Martinez will "invariably lose".
Or you're basing your assesment of Toney's ability to dominate players on more than just his physical stature, in which case you're applying a different standard to him than you are to Martinez.
Or you simply didn't know Toney was as small as he is, not realising that framing him as such a physically dominant presence undermined the point about size you were trying to make regarding Martinez.
Either way, the argument makes no sense. If physical size is that limiting, it should apply to Toney versus the 6ft+ CBs he regularly beats physically even more than it applies to Martinez versus Toney. By the standard of your argument against Martinez, Toney should "invariably lose" those duels he regularly wins against far larger opponents.
Not sure that’s how it works where you create a bunch of hypotheticals and then dismiss them as my argument making no sense.
But anyway, it is not based on his height as such, it is more his strength. Watching Martinez, he looks thin and weak. I wouldn’t expect Toney to push David Alaba around, simply because he looks a lot stronger than Martinez, despite also being a short centre half, or even Tyrell Malacia. I would expect Brian Brobbey to push Victor Lindelöf around despite being shorter than him because he is stronger than him. It’s not that complicated, and doesn’t require this level of sensitivity quite frankly. Martinez will struggle against players who are bigger and stronger than him in physical duels.
I’m also far from convinced that Toney is only 1cm taller than Martinez or whatever anyway, but that’s by the way.