That is such BS.
How many regiments of Brahmos do we have deployed/plan to deploy? AFAIK
4-5
How many regiments of Pinaka do we plan to deploy?
22
How many regiments of towed artillery do we have deployed/plan to deploy?
~200
We have a very large front manned by a very large Infantry. When they need fire support, which they do need regularly, they do not dial the air force. They do not dial the Composite missile brigade. They do not always dial the rocket artillery regiment. They almost always dial the tube artillery regiment.
When we open the front after a formal declaration of war, we are not going to wait for the enemy to hit us. We are going to open the heavy arty on all areas of enemy force concentration with EVERYTHING we have got. Tube arty will be used for an offensive role here and there will be gun duels until a stand-off distance is created between the defensive lines. Later, the pressure on such a retreating enemy defensive line can be increased with tube arty firing on a number of points in the enemy defensive line, thereby weakening them.
The other assets like rocket arty and missiles are used to achieve a break in enemy defensive perimeter to make room for our maneuver formations to exploit. Alternatively they may be used to bring enemy armour pincers to a grinding halt.
And I dont get your assertion that Tube arty is not accurate while rocket arty is. On a besieged enemy, or even on an enemy defensive line whose SATA assets are compromised, a forward artillery observation officer can call on fairly accurate and sustained tube arty barrages, better than what NAVIC guided arty rounds or rockets can achieve with just a drone for target acquisition.
Tube arty was and will continue to be the backbone of the Regiment of Artillery in the Indian Army. However, it will see considerable modernisation, particularly along the lines highlighted by
@Kunal Biswas in this post
Indian Army Artillery
Particularly the part about smart arty rounds and other EW methods to spoof enemy Counter-battery Radars.