What you say about the author may well be true, but he happens to bring up a good point: getting a constitutional amendment passed is extremely difficult and assumes that there is more or less of a consensus on the point in question. No such consensus exists for the topics that conservatives tend to care about.
Voting is like gambling in a casino where the cards are all marked, the slots are all fixed, the dealers are all crooked, and the floor staff are all pickpockets. And expecting that you’ll somehow come out ahead
I'm not denying the constitutional amendment process is difficult. The founders intentionally made it that way. But it's not impossible, as seen by the fact that we have 27 Amendments at present, all proposed by Congress. But now the Congress is so dominated by establishment career politicians that the alternative amendment process of the Article V convention of the states is being discussed seriously.
Over the last five years or so, the trend is that state legislatures are becoming more Republican, and, in general, more conservative. In other words, we're not all that close now to having enough, but the trend in the state legislatures nationally is in a conservative direction. There have to be 34 state legislatures in line for an Article V convention of the states to be called. Some have already approved of the convention.
I suggest you read Mark Levin's book, "The Liberty Amendments," for a good discussion of the Article V convention of the states process and some interesting amendment proposals.