Um, no. I think the fact that he is 20 years older is a very valid reason for not hitting the ball as far as the young guys.
I agree that it is a plausable reason why he doesn't hit it as far as he would like. That isn't the point. The point is that he felt the need to defend/justify his self worth by bringing it up in the first place.
It's quite healthy to compete AGAINST your playing opponents. You can shake their hands and buy them a beer afterward, but in the mean time, go ahead and try to bury them. The only thing better than winning by 5 strokes is winning by 6.
You're basically making two assertions here.
1/ You can act with a different mentality outside the context of playing.
2/ Having an enemy image of your opponent promotes the will to win.
The first assertion is not necessarily true because it presupposes the ability to change one's mindset at will. The instant changing of belief structures to the situation is possible, but certainly it would require alot of effort to control the mind this well.
Even if we accept the first assertion to be true, that is not an argument against the supposition that creating an enemy image isn't a mentally good thing to do.
The second assertion is actually true. This mentality will give you a will to win from an extrinsic motivational standpoint. It's not about whether it gives you a will to win but whether it also gives a fear of failure. When you create an enemy image of your opponent, you start aligning your value to the results. That's okay if you're playing well but if you're playing mediocre, it sends you mentally on a downward spiral.
Your statement also implicitly presupposes/argues that it is the only way to have the will to win which is not the case. The will to win can also come from a comradery viewpoint through intrinsic motivation. So unless you can somehow show how this is not the case, we can agree that both belief structures have this positive attribute.
Embracing competition and striving to win is part of the spice of life.
I agree but what has that got to do with the temerity of viewing others as your enemy?
When you've lost previously, but then work hard on your game and prevail.....that's a beautiful thing.
Implying that satisfaction can only be gained through vindication of self-worth in relation to others. It's not beautiful to abuse yourself. What you're arguing is the equivalent of putting a tight pair of shoes on to have the satisfaction of taking them off.
You can get satisfaction from improvement but there is no need to beat yourself up along the way which is the result of 'enemy' pecking order thinking.