Short term yes poker is gambling...
Gambling is the
wagering of
money or something of material
value (referred to as "the stakes") on an event with an uncertain outcome with the primary intent of winning additional money and/or material goods. Typically, the outcome of the wager is evident within a short period.
Lets change that short period and look at over time. If you look at it over time... Poker is still gambling for 95% of the players out there. Over time 95% of people out there will not be winning poker players and thier profitability will be dependent on luck (might be a little high but you get the point). There is a skill to poker that 70% dont know or vaugly know exist, 25% (or less) want to achieve this skill, and 5% try to hold on to this skill.
For an addict he is not able to control himself as he is addicted to the high, so he not is able to control his outcome over time. For him poker is always gambleing and is reliant on chance.
For someone like this it is easier to blame the game than admit that there are others who can control themselves. For most people having a glass of wine at dinner is not really drinking but to an alcoholic who cant control himself a glass turns into a bottle cause he cant control himself. So a glass of wine is drinking to him. (I could try to make the argument for addiction to cigaretts and "illegal drugs" but it could be taking it a little too far for this rant
I think as a poker player you should just recognize that some people lose controll and that you should just keep poker in the right ballance in your life (whatever amount that is). As long as you stay in control and keep that control then you should be fine.
If poker is gambling then what else is gambling? Stock Market... There is an uncertian outcome with every stock/mutual fund you purchase (yes you can minimize your risk and make what you percieve as EV+ bets). When I was getting my fianance degree we talked about things like this a few times..
http://www.automaticfinances.com/monkey-stock-picking/ If a monkey or randomness out perform the pros 39% and this is OVER TIME that is scary... There are other cases where the monkeys out perform the S&P or almost all mutual funds ect for a given year but with a spread of 100 cases and 14 years I think this gives a more reliable set of data (although it is from the WSJ). I think that there are a lot of similarities to investing and poker (also a lot of differences) and how they relate to gambling. More or less you take educated risks.
You should ask the guy if he thinks investing is a form of gambling too because the outcome is uncertain? Still should not stop you from doing what you want to.
Anyway sorry for the rant... I think if you are asking these questions and keep things in ballance you are fine.