The sentence is correct and usable in written English.
You can use it when you wish to emphasize that something is explicitly essential. For example: "It is obviously essential to practice social distancing during the COVID-19 pandemic."
It is obviously essential to any new round of rule-making.
"It is obviously essential to the independence of the States, and to their peace and tranquility, that their power to prescribe the qualifications of their own officers..
Because of the importance of these conclusions for galactic structure and evolution, it is obviously essential to determine what proportion, in fact, of the absorption systems are intrinsic to the QSOs.
To study gene function in natura, it is obviously essential to integrate molecular biology, ecology and evolutionary biology.
Although it is optional (default value is false), it is obviously essential to correctly interpret this element when using PSI-MI formatted datasets.
If models of illness are to map onto the underlying functional systems of the brain, it is obviously essential to take close account of normal as well as abnormal brain function.
Since this would represent a second revision of the Singer-Nicholson model (besides nanometric rafts), it was obviously essential to further put the micrometric compartmentation model into test.
While the 7.5 Å resolution of the current LdcI-LARA reconstruction precludes building a reliable pseudoatomic model of the 329 360 LARA domain loop based on the experimental EM density, its structural plasticity is obviously essential to fullful this role.
Professor David Lewis Director, Whistleblowing research unit, Middlesex University Support and protection for whistleblowers is obviously essential, and it is disgraceful that it has failed to be adequately ensured for years.
Such a provision is obviously essential; and it is equally obvious that it cannot be either peaceable or effective by making every part an authoritative umpire.
Elevation is obviously essential but it need not be the only salient trait – a chip can succeed because of its sheer unexpectedness, meaning the keeper could have reached it if only he'd anticipated it.
