None of that will mean anything if a person isn't keeping God's commandments:
"One who turns away his ear from hearing the law, even his prayer is an abomination." - Pro. 28:9
"And whatever we ask we receive from Him, because we keep His commandments and do those things that are pleasing in His sight." - 1 Jhn 3:22
There have been times where God made an exception, but the Bible says God will generally refuse to listen to people who willingly reject His commandments. If a person isn't keeping His commandments, they are literally starving themselves and talking to themselves for nothing.
There are other ways to interpret that. You posted your own words to state a position regarding that scripture. But I find scriptures speak for themselves.
Proverbs 28:9
King James Version
9 He that turneth away his ear from hearing the law, even his prayer shall be abomination.
This clearly means that the individual will not hear the law at all. That doesn't say that he heard the law and realized he is a sinner. In fact we find from the parable of the Pharisee and the Publican just the opposite is true:
Luke 18:9-14
King James Version
9 And he spake this parable unto certain which trusted in themselves that they were righteous, and despised others:
10 Two men went up into the temple to pray; the one a Pharisee, and the other a publican.
11 The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners, unjust, adulterers, or even as this publican.
12 I fast twice in the week, I give tithes of all that I possess.
13 And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner.
14 I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.