Our daily remembrances, in and of themselves, have no healing or protecting power. Those remembrances are neither physicians nor guardians. They are merely a reason for us to enjoy Allah's protection and care. Allah is our protector and everything that happens takes place according to His decree. Allah indeed protects his devotees on account of their worship, devotion, supplications, penance and good deeds.
Our daily remembrances are just like our supplications. When we beseech Allah for something, and do so with sincerity, presence of mind, certainty of faith, and positive expectations, we know that Allah answers our prayers. However, Allah, in his wisdom may answer our supplications in different ways. He may give us specifically what we ask for. He may, instead, remove a harm from us that would otherwise have befallen us. He may also postpone the answer to our supplication and give its benefit to us in the Hereafter, when we need it the most.
Rain clouds are merely a reason for precipitation and not a guarantee of rainfall whenever they pass overhead. If Allah wills, the clouds will bring rain. If He so wills they will pass over and drop their rain at some other time and place. In the same way, our supplications and remembrances are a reason for our attaining Allah's protection and reward. It is Allah's will when and how He will answer them.
It needs to be said that when a person beseeches Allah with a distracted mind or with a pessimistic attitude, the supplication might not be answered at all.
The Prophet (peace be upon him) said: "Allah does not accept the supplication of an inattentive and distracted heart." [Sunan al-Tirmidhi]
The same applies to our daily remembrances. If we chant them ritualistically, without any presence of mind, we cannot expect to attain the full benefit of those remembrances. Our remembrances are essentially supplications. They are a means by which we beseech Allah, invoke His name, and remember Him. Therefore, if we recite the words of our remembrances insincerely, or with heedlessness or negativity in our hearts, we might very well be deprives of the blessings of our recitation.
"Supplications & Remembrances" - Sami Al-Majid