I wonder if you've been in the same boat at times? You don't have to answer that because I know that you have! We all have. We might not have said it out loud, we might not EVER admit it but we have all felt this at times. But I don't think that statement is in and of itself a bad thing because it shows a longing in one's heart to "get something out" of the worship service (cf. Psalm 63:1-5).
He wants to worship correctly (i.e. in spirit and in Truth - John 4:24) but feels as though he is not able to because something is holding him back. He wants to feel as though he is fulfilling his earthly duty (Ecclesiastes 13:12) but something, whether that be his heart or physical stresses, is standing in his way.
However, that feeling fails to realize a few points.
Worship is active and action produces satisfaction.
A person that is active in ministry and worship will not only be productive for Christ, but he will reap the earthly benefits of such.
True worship results in a better atmosphere for the future.
Now, which of those results is a detriment to the future? The answer is absolutely none. Not because just going to worship and punching a time card, if you will, has any lasting effects, but because the active worship of an individual produces actual blessings in his life!
Remember, it isn't necessarily wrong to think "I don't get much out of worship" but it is wrong to think that that feeling negates the necessity of our putting our all into worship. When we realize these things, we will be able to see that we get out of worship only when we put into worship.