That looks like yet another vague non-technical report lacking in quantitative analysis.
Nevertheless, after skimming through it it disagrees with your claim that "the need for storage is a myth". For example, on page xviii:
"Some key technologies, which are critical for deep decarbonization in all DDPs, are not yet technically mature or economically affordable. They include:
Advanced energy storage, flexible load management, and integrated portfolio design for balancing power systems with high penetrations of variable renewable energy"
And you also might not like page 166:
"To be realistic, nuclear power and fossil-fuel power generation with CCS each offer the largest scope for decarbonization of the energy system to 2050."
I've found it impossible to take Lovins seriously since he claimed that UK new nuclear cost was seven times that for wind in the US - for that to be true, you'd need to build, install and maintain a wind farm while selling the power it makes for 2 cents per kWh. That's either just plain lying or, if he truly believes it, a sign that he hasn't checked his facts carefully. Or indeed at all.